This one pops into my head every so often and I've never found it again. It was a short story which I think I read some time in middle school so probably late 70s or 1980. I think the book was from the school library, so it might be much older. The story was in English, and I am and was then in the United States.
The story is told in first person. The protagonist tells us his name, and makes a point of saying it's like in a song. However, the song itself didn't hold any meaning for me back then, and so I don't remember it now.
The protagonist wakes one morning to discover he is... I guess the best word is "Unnoticeable." No matter what he does, no matter what the physical consequences, people will no longer notice he exists. They don't see or hear him, or even see direct results of his actions, or even feel him if he hits them.
As I recall, the story begins when he wakes in the morning, to his wife shouting at him to get ready or come to breakfast. But when he gets downstairs, she just keeps on shouting for him to come down even though he's in the room with her.
He leaves for work, thinking his wife is playing some silly game, perhaps a punishment for something she thought he did. He goes to the bus stop. When the bus arrives, people all crowd him out and he's last to get on. The driver closes the door on him, and he has to pull free. He's mad, and walks onto the bus without paying.
At work, he calls someone. Doctor, maybe? The phone works for him, but when he tries to speak to the person at the other end, they just talk like there's no-one on the line and finally hang up.
Later, I think at a hotel, or at least some building with a lobby, he steals a newspaper because the guy won't acknowledge him.
Later still, he gets on an elevator, experiencing the same problem with the operator closing the door (and now I think the tale must be pretty old. When did elevators still have operators?). He's finally had enough and punches the elevator operator. Despite drawing blood, the operator still doesn't seem to notice the protagonist, or the injury. The protagonist gets mad and hits him over and over, breaking his nose while he stands at the controls smiling.
Finally, he meets a guy who seems to be laughing at him, and goes to hit that guy, but THAT guy notices him and tosses him around the lobby, while no-one else notices all the collateral damage they're causing. At some point they talk and the new guy explains what's happened.
The story ends with the protagonist asking the reader to please, just notice him.
Hope that's enough detail. Can anyone point me this author and story?